Take a number of shots using lines to flatten the pictorial space. to avoid the effects of perspective, the sensor/film plane should be parallel to the subject and you may like to try a high viewpoint (i.e. looking down). Modern architecture offers strong lines and dynamic diagonals, and zooming in can help to create simpler, more abstract compositions.
Review your shots from both parts of Exercise 1.3. How do the different lines relate to the frame? There’s an important difference from the point exercise: a line can leave the frame. For perpendicular lines this doesn’t seem to disrupt the composition too much, but for perspective lines the eye travels quickly along the diagonal and straight out of the picture. It feels uncomfortable because the eye seems to have no way back into the picture except the point that it started from. So for photographs containing strong perspective lines or ‘leading lines’, its important that they lead somewhere within the frame.
It was much harder to find successful images where I was able to flatten the perspective, most were achieved by either taking the picture downwards as in the image of the post it notes or directly front on. They are interesting images but they have a more ‘abstract’ or ‘detail’ quality. The lines strengthen the shape but I find I look more at the image as a whole rather than allowing my eyes to follow a predetermined route. I feel as though I am looking at an image but I am not part of the image.